Lubricating apparatus



May 5, 1953 w. G. HOELSCHER 2,637,412

LUBRICATING APPARATUS Filed Sept. 8, 1948 5 Sheets-Sheet l a w A.IZINVENTOR.

BY Lila-0J any, Hum 5am Arman/6Y5,

M y 1953 w. G. HOELSCHER 2,637,412

LUBRICATING APPARATUS Filed Sept. 8, 1948 5 Sheets-Sheet 2 AW//."///////// ////////////////l Ar'l/JVl/l/l/l/l/l/ INVENTOR.

A TTORIVFYS Filed Sept. 8, 1948 LUBRICATING APPARATUS 5 Sheets- Sheet 4lia i m 179 11a i 174 172 186 INVENTOR.

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gammy/W ATTORNEYS.

apron. The apron includes a reservoir or sump for the lubricant supply,therefore, the high volume discharge to the apron during machineoperation, to fiood the driving gears and bearings simply drains back toa reservoir. The low volume discharge to the carriage is adequate but isnot sufficient to cause flooding and dripping from the lathe bed.

Another object of the invention has been to provide a combined automaticand auxiliary lubricant pump constructed as a compact simplified unitwhich may conveniently be removed from the front of the apron forinspection or servicing and which projects directly into an oilreservoir formed in the apron so that the oil is received into bothpumps directly from the reservoir. A further object has been to providea pump assembly of this nature having passageways formed directly in thepump casings so that the respective displacement chambers of each pumpunit interconnect with the displacement chambers of the other, such thata single pair of delivery arteries supplies oil in common from eitherpump to the point of discharge thus simplifying the lubricantdistribution system.

Still another object of the invention has been to provide an automaticdelivery pump which is interconnected with the feed gearing of the apronin such manner that the automatic pump operates whether the carriage istranslated by hand, by means of the feed rod and gears, or by means ofthe feed screw. In its delivery stroke the automatic pump is springpowered so that it may stall and avoid damage should the system becomeclogged or otherwise inoperative. The manual pump is spring driven onits return stroke to give the operator positive control over thedelivery of oil.

A still further object has been to provide a distribution system inconnection with the automatic and manually operated pumps which includecheck valves placed at strategic points to prevent drainage of lubricantfrom the system, to keep the distribution system charged at all timesand to prevent trapping of air in the system so that a positivelubricant displacement to the bearing surfaces occurs immediately uponoperation of either pump.

Further objects and salient features of the invention will be disclosedin the detailed description with reference to the accompanying drawingsdisclosing a preferred embodiment of the invention, so that thoseskilled in the art will comprehend the various modifications to whichthe invention is susceptible.

In the drawings:

Figure 1 is a fragmentary side elevation of a lathe bed with thecarriage mounted thereon, illustrating the general arrangement of thecarriage, the location of the lubricant pump, and the gear train fordriving the automatic pump when the carriage is translated.

Figure 2 is a top plan view projected from Figure 1 of the carriageapron with the saddle removed so as more clearly to illustrate thearrangement of the lubricant channels, gear train and other componentsof the apron.

Figure 3 is a fragmentary sectional view taken on line 33, Figure 1,illustrating the bed ways, with the carriage saddle mounted thereon, andthe tool slide mounted relative to the saddle, together with the variouslubricant ducts to illustrat generally the manner in which the lubricantis distributed to these parts.

Figure 4 is a fragmentary sectional view taken on line 4-4, Figure 1,illustrating the mounting of the lubricant pump assemblies with respectto the apron.

Figure 5 is a sectional view taken on line 5-5, Figure 4, detailing thehand or auxiliary pump assembly.

Figure 6 is a sectional view taken on line 6-6, Figure 5, illustratingthe auxiliary and automatic power driven pump assemblies and theirrelationship with each other.

Figure '7 is a sectional view somewhat similar to Figure 6, furtherdetailing the relationship between the two pump units and the lubricantpassageways interconnecting the two units.

Figure 8 is a sectional view taken on line 8-8, Figure 6, detailing theautomatic power operated pump structure and the driving apparatus forthe plunger of the pump.

Figure 9 is a sectional view somewhat similar to Figure 8 taken on line9--l, Figure 6, further detailing the lubricant passageways formed inthe housing of the power operated pump unit.

Figure 10 is a sectional view taken on line ill-l9, Figure 9, detailingthe cam shaft, driving gear and cam follower of the power operated pump.

Figure 11 is a sectional view taken on line li--l E, Figure 9,illustrating the lubricant passageways leading from the hand and poweroperated pumps to the apron lubricant conduit.

Figure 12 is a sectional View similar to Figure 11, illustrating the oilpassageways leading from the pumps to the carriage lubricant supplyconduit.

Figure 13 is a simplified diagram illustrating generally the arrangementof oil passageways leading from the power operated automatic pump andfrom the hand operated pump to the main delivery conduits for conductinglubricant t0 the apron and carriage respectively.

General description of the carriage structure Referring to Figure l,which illustrates the general arrangement and organization of thecarriage and lubricating apparatus, the bed of the lathe is indicatedgenerally at l5 and the lathe carriage, generally at l6. The lathe bed iof the usual construction having sets of ways IT and it (Figure 3) inparallel relationship along the opposite longitudinal sides of the bed.For purposes of illustration, the forward side of the lathe bed isillustrated in Figure 3, but it will be understood that the rearwardside of the bed is substantially of the same construction.

In general, the lathe carriage constitutes a saddle 20 and an apron 25,which is secured to and depends downwardly from the saddle at theforward side of the lathe. The apron serves as a housing for the drivinggears by means of which the carriage is translated longitudinally and isprovided with the usual operating levers to control longitudinalcarriage feed and transverse tool slide translation. Following thegeneral practice, the lathe bed includes a rack 22, a feed screw 23 anda feed rod 24 by means of which power is transmitted to the apron forpower translation.

Referring to Figures 1 and 3, a tool slide 25 is slidably mounted uponways 26 formed in the upper surface of the saddle. A tool slide feedscrew 21 extends crosswise relative to the saddle and interconnects withthe tool slide in the usual manner (not shown) to permit the tool slideto be fed at right angles to and from the work either clearly giesenb'edhl'ei :fter.

Asf' shdwnili *Figurestl and. .Q .thenepz'engfi t; 111-" chides e gae-train by means otmhielitheg it 1- latedgand L WhiGE'tEF-OIJCIZWES Lgconeurtxpow n riven; luhr'ea t 1 I tandem -;;p1tactiee=,-t..the I pron=1 even W317 cennectin from h feed-viqd'tq" ither-xene-oi thesmatlibevel: eer. wh (th me ppasite iisl s; Qfi-th large- ;avel; geanfi3's; Thee; 7w -aenyjshe lever is moved irifeither ireutien feomitheeentmlized e pesitibn-shbvm, the largeibevelgeepiedriven:in g Jfi flf111 35; am 1 (recurs W11 the-selecteddirectimite.ceuse translatiol efthethe-can tl ens' eted whether mi- 130 I carriageas'semblzln Thelargebevekgeer meludee Whether by hand ep e; Q1011; M w a;=pinio11s3iwhickt meshes within-large 9265113132,. Agshown 11d Figure 6, the hand.an dupewer, and the la-rge geartfiiincludesammonia. The umpsectionearejoinecltogethelitq term aeiia pinion 33 meshes; vith elargegear:..3fi;which 112116;; Theicrwayqd wallfifllgffhe pir nlm li;includesiarpmion 35;:whichmeshestviththe rack an opening and the; handtum? sec-tie 22:1 Thus,w= the= rotationzof feedz md3e may be eludesefienge mrauil iligthepeenm '.I transmittedthroughzthe{gear;tz;ain:t0-;the.1331119 iadrilledte receivela;seiiee ofedeket hea EEQWhichim-tum ranslateathe:eemgiege 84553113", screws w ieheretfs vs tthr e ed-linte hole' 'blysbyyreztSorxbo ts =:rengagementwithing-teeth? The h oiqrack 22: F01 =-certa,mji classes; of 1; work;the carriage. translatedabyrmeansgm eedeerewfit. E017 twE-QUIPOSGQ'JHBLQDIGHlinfiludfifija pl ltilult (not shbwmi engaxgeablewiththescrewflt. split nutjis operetefizib 'a'he leveefifimhieh e11011:? dlsengagesg th split nut; with; the the feedsscrew'sfiqtthe.carriagee Th'e rapron alsou previflexxwith,enamelWheel I taiytaspennitsamnd,traszerse-eimheuc rrmee. Fer ela r j ;ep-nst1thiepurpfi mshaft pflI fihifllee fl wl fil reservoir 0- w v is}: Keyed;2 includes 13;; pinion 49;; mes "1%; with; a, m ext: gear; 43. Theeear:M meshes; with; met-Bar t2 7 miit which includes a, pinion' IE3. Pinion;&3 m 31,166 v 1 t, V fictitwithtl'leflarge gear 8A setthatgr eteticn eithe hand h l'dtiv sr-pi ne 0v r slat heseerltie t 'fp' The runninggeargehei :zand :b'eaz figs, above te sufiplirgfl 5 m rresfjyvg M 5.

v the Ae Shawn in Eigures; 5; 21 31 5. 6, at series of;

serib'ed are suppliegi wth lubrieent flGLF v I we 5 int-ekeewaYSfitkezgteegifmmthecas lubrieatmgepparatue; eithexxwhen thatapparatus operated manumlyfi 'by Mans aux-:1 ry pumptethe-lowerpOItItQnD=th the-aut ma-tic: 'QQWEilil'dlTi-Vfill Iubgatm ugplyBiting-1' W 4 v 1. ump, "Appmprmtec. commute. and te w tamed.hereinafter deser ibeti,distribute-the 011 to; these g n 011 t v r mwslt fi I 0t, any-awa le ble ecteeiielr cglaii GenemZF-arraflt eT/mnt 0j--Zubrtcpgtin'gequipmentw eefi i he? 1.. res-" a e free; them saddle m1to,01 slidfi-., E lever is, intended puma; ion use inpzehminexily lubricting the )mxs heibdl a entit e desembly afterl the machine me be 12.Shut down ora, somewhat extended: period e1 eugh it, maybe operated. atzmy time at the di etten 0f the operator. to, supply additlonei,1ub1'ieetien. F b fh Thezalitpmatiepowerxlrivensection ef thep mp ffmoi? me 35 g fl Q; eperates-independently Q1; themenugllyhQpamtedstimulat- -zroeve fie m erm ed mthe Queenie chem eeetien whenevertheclerriege-istrensletted. 'i 3 Q i 5 E -fi are The newer eperated pumpassembly is driv erlhefl thtougn the sleeve t rmlt-vt 11v" meatns of theptniet; n; (Fig-gum 1 Whig}; of'oil-tl rough theeteeveto heatmut p g g;nesheewith: the; lamge gear. pnevie fily It will b e r mted thatthehousingfil qtthe ux noted, whenttheaanxieeeiemanslateegm PQW-fir 7. newmay 19l1434 figtqfi miiwawiw at opposite ends. These plates close oiIthe bore 62 and maintain the sleeve 64 in position in bore 62, thesleeve 64 for this purpose including a shoulder "it and the bore 62having a counterturned end to receive this shoulder. Gaskets 1 I ll aredisposed between the end plates and pump housing to provide an oil tightseal. The respective end plates are secured in position by means of aseries of socket head screws 12. By removing the right hand plate asviewed in Figure 5, the filter unit E may be removed from the assemblyfor replacement. As previously noted, a separate distribution system isprovided respectively for the running gear of the apron and for thesliding surface of thecarriage which bears upon the tool slide. Thesesystems are interconnectedbcth with the auxiliary hand pump and withtheautomatic pump so that operation of either pump supplies lubricant toboth systems.

In order to provide lubricant supply from each individual pump to bothdistribution systems, the lubricant passes from the auxiliary pumpthrough the automatic pump when the auxiliary pump is actuated, andpasses directly from the automatic pump to both supply systems when theautomatic pump is operating. It is to be noted at this point that therespective pumps each are of the positive displacement plunger type sothat a predetermined discharge of lubricant occurs at each stroke.Additionally, each pump is of the dual displacement type for whichpurpose each includes a-single plunger having a low volume, highpressure piston, and a high volume, low pressure piston; The pumps arearranged in such manner that manual operation of the auxiliary pumpcauses high volume, low pressure oil displacement to the carriage, andlow volume, high pressure oil displacement to the apron running gear,and conversely the automatic pump provides low volume,

high pressure delivery to the carriage and high volume, low pressuredelivery to the apron running gear. The apparatus is arranged in thismanner because a relatively large volume of lubricant is requiredadequately to supply the lathe ed and tool slide, while a relativelysmall volume of oil is sufiicient to lubricate the apron running gearprior to starting the machine. On the other hand, during carriagetraverse, a lesser volume is supplied to the ways and tool slide and alarger volume is supplied to the apron running gear. setting up foroperation, it is recommended that auxiliary pump lever be operated forseveral strokes to place a suficient amount of oil on the bed ways untilthe automatic supply goes into effect. Thus, a relatively large volumeof oil, sufficient to provide a film between the saddle ways, is placedbetween the bearing surfaces before translation of the carriage to avoidexcessive wear and to provide easy starting of the machine. It will beapparent that during automatic operation, a lesser supply is requiredfor the bed ways since the lubricant will accumulate by reason of thecontinuous operation of the automatic pump during carriage translation.It has been determined for a given size of machine that the auxiliarypump should displace approximately .77 cu. in. of oil per stroke to theapron, and approximately 1.7 cu. in. per stroke to the carriage. On theother hand, in view of the continuous operation of the automatic pumpand the fact that the apron lubricant drains back to the reservoir, adisplacement of approximately .020 cu. in. per stroke has been foundadequate for the carriage, while the pump supplies .126 cu. in. perstroke tothe apron running gear. It will be apparent, however, that the'dischargemay be varied according to the quantity of lubricant, machinesize and design, and other factors.

Auxiliary pump construction hand end of plunger 74 includes a highvolumedischarge piston 15 which is effective for its full diameter fordischarging the oil from displace-- The intermediate portion of:

ment cylinder 13. the pump plunger 16 is somewhat smaller in diameterand is slidably fitted in a bushing 11 which is secured by means of ascrew 18 in bore 13. The left hand end of the plunger includes a head orpiston 19 of substantially the same diameter as piston iii. Each pistonincludes a series of oil grooves ac to provide an oil seal. The piston19 is secured by means of a nut 8i screwthreaded upon a shank 82 topermit the bushing 11 to be slipped on the intermediate plunger sectionis prior to assembly of the plunger unit in its bore 13. The boresection between the sleeve 11 and head it constitutes the high pressure,low volume displacement chamber 84. i

As shown in Figures 4 and 5, plunger '15 is actuated by means of theauxiliary lubricant sup-' ply lever 4% which is pinned to shaft 85. Theshaft 85 is suitably journalled in the opposite side walls 85 and ill ofpump housing 5%. An actuat-. ing lever 88 (Figure 5) is keyed to shaft85 as at 8 and the free end of the lever contacts the abutment end 9! ofplunger '55. Disposed within a bore formed in plunger [4 is acompressionspring '92 bearing against the plunger and having itsopposite end seated against the end" plate 63. to. maintain the plungerunder spring compression against the end of lever 88. Thus, when the manual lever 4c is moved downwardly, the pump plunger is forced to theright as viewed in Figure 5. Downward movement of the hand lever provides the delivery stroke, the spring 32 serving to return the plungerand lever to the starting point.

As the plunger it moves toward the left during its return stroke,lubricant passes from the inside diameter 65 of bushing 64, through theradial opening 6?, annular groove 65,120 a vertical passageway havin aball check valve 54 maintained in a cage or thimble 85 which isscrewthreaded into bore 2-3. A cross pin 96 prevents upward displacementof the ball. Passageway 83 is drilled through from bottom of housing 54prior to installation of the filter unit and the open end of thepassageway is blocked off by a plug 5)? screwthreaded into the bore. Asthe lubricant is drawn past the ball check valve, it passes into alateral passageway 98; tlsience upwardly into the displacem nt chamber Abranch passageway its (Figurefil extends from passageway 93 to avertical passageway mi opening into the low volume, high pressuredisplacement chamber. A ball check valve E32 maintained in a cage M3 issecured in passageway llil by means of cross pin Hit. During the returnstroke of the plunger 75 therefore, the lubricant flows upwardly throughball check valves 94 and H372 to the and low volume displacementchambers l3 and 8 respectively.

When actuating lever 46 is moved downwardly, the piston l4 moves to theright as viewed in Figure 5, forcing oil from the large volumedisplacement chamber, 73 through branch passageway 98 into a lateralpassageway Hi5. As shown auxiliary pump in reverse order so that the lowvolume displacement chamber as of the auxiliary pump communicates withpassageway I S and with the high volume displacement chamber ill or" theautomatic pump. Thus, when the auxillary hand pump is operated, highvolume discharge occurs through passageway H9 and low volumedisplacement through passageway 134i and when the automatic pumpoperates, the distribution of oil is reversed. automatic pump isoperating the high volume discharge occurs through passageway l34 andlow volume dischar e occurs through passageway H9. The reversal of oilflow is most clearly disclosed in Figure 13 which diagrams in asimplified manner passageways from the two pumps to the carriage apronconduits.

As shown in Figure '3, lubricant is supplied to the automatic pump fromthe inside diameter of bushing lateral passageway 57, annular groove anipple lilil to a passageway ill! of pump housing illt Pass'ageway it!communicates with the slot tilt of a manifold plate i83 (Figure 8)secured by screws Hi l to the bottom of pump casing A gasket :85 isinterposed between manifold plate 583 and the pump housing. A pair ofball check valves 586-485 confined in cages it! are interposed betweenthe manifold slot E82 and the respective high and low volumedisplacement chambers I16 and ill.

As cam shaft i l rotates, the cam Ml swings the lower end it! of hellcrank lever I52'to the right causing lubricant to be drawn through thecheck valves lot-486 into the high and low volume displacement chambersI16 and I'll. As the high point of the cam passes roller Ml, compressionspring lob forces the plunger to the right causing discharge of oil fromthe respective displacement chambers under spring pressure. Thus, thecompression spring prevents lost motion in the pump actuating parts andthe pressure of the lubricant discharge is controlled by the spring. Inother words, should the lubricant distribution system become clogged,the spring will permit the plunger to remain stationary by reason ofback pressure. i

Oil distribution system As disclosed in Figures 1, 2 and 3, the apronlubricant conduit E35 extends upwardly from the pump and communicateswith a bore open at the top of the apron. As shown in Figure 3, thelubricant is supplied to the grooves lilo-I90 from The carriagelubricant conduit ll 3 likewise. opens to the top of the apron, seeFigure 2, and a vertical passageway I95 (Figure 3) registers with thedischarge opening and communicates with a cross passageway i 98. Aseries of vertical branch passageways i9? extend between crosspassageway 195% to the ways il-i8 of the lathe bed and.

upwardly to thetool slide ways 26 to lubricate the saddle and tool sliderespectively. The oil distribution system follows substantially thatdisclosed in the above noted co-pending application and for this reason,it is not deemed necessary to further elaborate on this structure.

, Byvirtue ofthe presentapparatus the opera;

That is,'when the l2 tor is able to actuate the auxiliary pump to placea film of oil on the bed ways either prior to starting the machine, orat any other time that he believes additional lubrication to benecessary. By reason or" the interconnection between the hand and powerpumps, the apparatus is of ultimate simplicity and efliciency. Byleading the lubricant supply from the manual pump to the automatic pumpin alternate directions, the proper amount of lubricant suppliedautomatically so that suflicient lubricant is supplied to the ways forstarting and a low volume of lubricant is supplied during automaticoperation to prevent flooding. As above noted, the high volume automaticdischarge to the apron is immaterial since excess oil drains immediatelyback to the reservoir in the apron. By assembling both the automatic andhand operated pumps together and mounting the unit to the outside of theapron, the complete assembly may conveniently be removed for service orrepair when desired.

Having described my invention, 3. claim:

1. An apparatus for lubricating the bed ways apron gearing of a lathecomprising; a manually operable lubricant suppl'y pong, a hand leverconnected to the manually operabl amp for reciprocating the same, anautoin: lubricant supply pump associated with said. manually 0peratedpump, driving means connecting the automatic pump to the apron gearinfor reciprocating the same, a hi h volume and a low volume displacementpiston and chamber in each of said respective pumps, a lubricant supplyreservoir associated with both of said pumps, a lubricant distributionsystem leading from the respective high volume and low volumedisplacement chambers of said manually operated pump and automatic pumpto said carriage and apron gearing respec tivcly, the respective highvolume and low volume displacement chambers of each of said pumpscommunicating with each other in reverse order whereby operation ofeither of said pumps supplies lubricant to the carriage and aprongearing concurrently at high and low volume displacement, the high andlow volume displacement being supplied in reverse order to the carriageand apron gearing upon operation respectively of the manually operatedpump and automatic pump.

2. An apparatus for lubricating the carriage and apron gearing of alathe comprising; a manually operable lubricant supply pump, a handlever connected to the manually operable pump for reciprocating thesame, an automatic lubricant supply pump associated with said manuallyoperated pump, a high volume and a low volume displacement piston andchamber in each of said respective pumps, a lubricant supply systemassociated with said pumps, a lubricant distribution system leading fromthe respective high volume and low volume displacement chambers of saidmanually operated pump and automatic pump to said carriage, and aprongearing respectively, driving means between the apron gearingand saidautomatic pump to operate the same when the carriage is translated, thehigh volume and low volume displacement chambers ofsaid automatic pumpcommunicating in reverse order with the high and low volume chambers ofsaid manually operated pump whereby operation of either of said pumpsdelivers lubricant to the carriage and apron gearing concurrently athigh and low volume displacement, the high and low volume displacementbeing supplied in resweets sways cross conlcvv displacement c cryarteries comsaid res-pee ve passageways.

" binetl manual and automatic mly pump for the carriage and apron pump 6er having a high and. low dis- 1, hand lever connected to. said forreciprocating the 1. operated pump casing operated pump casing,slirlably disposed in said.

power operated color-coating same when the l, a lubricant distributionsystem 1 M lubricant to the carriage and us lacement pistons, thedisplace- "l W en l" operated Bump becant to the carriage the low volumeto the apron gearing, and the displacement piston of soicl poweropera-teal. pump plunger being arranged. to supply the low volume oflubricant to the carriage and. the high volume to the apron gearing whenthe lathe in operation.

5. A lubricant supply pump for a lathe or the like comprising; a handoperate-cl pump having a high and low volume displacement plunger, ahand lever connected to said. hancl operated pump plunger forreciprocating the same in discharging direction and. including a springfor reciprocating the same in charging direction, a power ouerated pumpassociatecl with said hand. operatetl pump and. having a high and lowvolume displacement plunger, driving Jeans in connection with said poweroperated. no plunger arrangerl to reciprocatc the "me in chargingdirection when the lathe is n coa in operation, and including a springfor tiriving said. power operated pump plunger in discharging direction,a lubricant supply system communicating in common with said plungers andrespective lubricant distributing systems ez-ztencling from the high andlow volume uisplaceinent luugers oi each of said pumps to the componentsor the lathe, whereby said manually operated ump be actuated to supplylubricant at h n and low volume displacement to the components of thelathe under positive discharge operation of saicl hand lever prior toplacing the same in operation and said power operated. pump supplieslubricant at high and. low volume displacement to the components of thelathe automatic-ally uncler spring pressure during lathe operation.

6. In a lathe having bed ways, a carriage slidably sustained on saidwere, an apron, and apron the respectively from said gearing, a.lubricant supply bump for discharg inc: lubricant. to said. carriage:and apron gearing respectively comprising ;v a manually operatedv pumpcasing. secured to: salsa-pron, a lubricant rerservoir in communicationwith said. manually actuated pump casing, a manually operated pumpplunger slidably mounted in said casing, the manually operated pumpplunger being in com munlcation withthe apron gearing andcarriagerespectively and adapted. tov advance lubricant from the" reservoir tothe carriage and apron gearing; an actuating lever'in operative connecticn: with said, manually operated, pump plunger, an, automatic pumpcasing associated with said manual casing, the automatic pump casingbeing in communication with said lubricant reservoir, a power operatesdischarge plunger sliclably mounted in saiol automatic oui'u casing.said power operated plunger respective high and low displacement pistonsin ccrcrnunlca tion with the apron. gearing and carriage resocc tivelyand, adapted to advancev lubricant from the reservoir to the carriage,and apron gearing, driv lug means in connection. with. saiclv poweroperated plunger for actuating the same. when the carriage istranslated, a, spring associated with said power operated, plunger. analadapted to. actuate thesame during its clisonar-roev stroke, wherebysaiol manually actuated, pump; plunger provides. posi-= ti've lubricant.displacement ancl said.- oower spar atcrl pump lunger is'urgec. indischarge pcli'rcction by spring pressure adapting the same to stallwhen the back: pressure becomes excessive.

7. In a lathe having bed ways, a carriage s1id.- ably sustained onsaiclways, an apron, and apron gearing, a lubricant supply pump fordischarging lubricant to said carriage and apron gearin respectivelycomprising; a manually operated pump casing secured to said. apron, alubricant reservoir in communication with said pump casing, a manuallyactuated puma plunger slidably mounted. in said casing, an actuatinglever in operative connection with said manually actuated plunger, said.manually actuated plunger having respective high and. low volumedisplacement pistons in communication with said carriage and aprongearing respectively, and adapted to ad.- vance lubricant from thereservoir to the carriage and apron gearing, a spring disposed. inoperating connection with the manually actuated plunger to return thesame to charging position after a manual discharge stroke, an automaticpump caslng associated with said manually operated pump casing, theautomatic pump casing being, in communication with the lubricantreservoir, a power operated discharge plunger sliclably mounted; in saidautomatic pump casing, driving means in connection with said poweroperated plunger for actuating the same during its charging strobe whenthe carriage is translated, the power operated plunger being incommunication with the carriage anti apron gearing respectively andadapted to advance lubricant from the reservoir totlie car= riage andapron, a spring associated with said power operated. plunger and adaptedto actuate the same during its discharge stroke, whereby said manuallyactuated puma plunger provides positive lubricant displacement and. saidpower operated pump plunger is urged by spring pressure in its deliverystroke adapting the same to stall when the back pressure becomesexcessive.

8. A' lubricant supply pump for attachment to the apron of a lathecarriage to supply lubricant to the carriage and apron gearingcomprising; a manually operated pump secured to the outside apron fortranslating the carriage relative to the bed of the lathe, a pinion onsaid automatically operated pump meshing with said gear train, a

lever on said manually operated pump for actuating the same, lubricantdelivery passageways extending from said pumps respectively to saidcarriage and apron gearing, said automatic pump operable through saidgear train to deliver lubricant when said carriage is translated andsaid manually operated pump being arranged for operationlindependent ofsaid automatic pump for lubrication of the carriage and ways prior totranslation of the carriage.

i 9. A lubricant supply pump for attachment to the apron of a lathecarriage for lubricating the carriage and apron gearing comprising; amanually'operated lubricant supply pump, a flange on said pump forattachment to the apron, said apron having an opening to receive saidpump and having a lubricant reservoir internally thereof, an automaticlubricant supply pump secured to said manually operated pump anddisposed within said apron, passageways in said manually operated pumpcommunicating with said reservoir, passageways intercomiecting said 3reservoir, passageways interconnecting said manually operable pump withsaid automatic pump to supply lubricant to both of said pumps from saidreservoir, a lubricant distribution system leading from said respectivepumps to the carriage and apron gearing, a manually operated lever indriving connection with said manually operated pump and driving meansWithin said apron operable to energize said automatic pump when saidapron is translated.

WILLIAM G. HOELSCHER.

' References Cited in the file of this patent UNITED STATES PATENTSNumber Name Date 649,027 Woodward May 8, 1900 1,410,125 Rhoads Mar. 21,1922 1,570,668 Griffith Jan. 26, 1926 1,607,855 Winkley Nov. 23, 19261,653,538 Barrett Dec. 20, 1927 1,660,899 Tillery Feb. 28, 19281,773,312 Leufstadius Aug. 19, 1930 1,781,755 G-roene Nov. 18, 19302,190,581 Wineman Feb. 13, 1940 2,229,085 Kocher Jan. 21, 1941 2,290,810Murad July 21, 1942 2,343,302 Kocher Mar. '7, 1944 FOREIGN PATENTSNumber Country Date Great Britain May 8, 1930

